/*

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* Script run inside a Customizer preview frame.

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*

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* @output wp-includes/js/customize-preview.js

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*/

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(function( exports, $ ){

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var api = wp.customize,

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debounce,

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currentHistoryState = {};

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/*

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* Capture the state that is passed into history.replaceState() and history.pushState()

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* and also which is returned in the popstate event so that when the changeset_uuid

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* gets updated when transitioning to a new changeset there the current state will

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* be supplied in the call to history.replaceState().

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*/

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( function( history ) {

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var injectUrlWithState;

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if ( ! history.replaceState ) {

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return;

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}

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/**

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* Amend the supplied URL with the customized state.

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*

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* @since 4.7.0

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* @access private

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*

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* @param {string} url URL.

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* @return {string} URL with customized state.

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*/

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injectUrlWithState = function( url ) {

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var urlParser, oldQueryParams, newQueryParams;

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urlParser = document.createElement( 'a' );

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urlParser.href = url;

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oldQueryParams = api.utils.parseQueryString( location.search.substr( 1 ) );

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newQueryParams = api.utils.parseQueryString( urlParser.search.substr( 1 ) );

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newQueryParams.customize_changeset_uuid = oldQueryParams.customize_changeset_uuid;

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if ( oldQueryParams.customize_autosaved ) {

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newQueryParams.customize_autosaved = 'on';

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}

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if ( oldQueryParams.customize_theme ) {

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newQueryParams.customize_theme = oldQueryParams.customize_theme;

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}

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if ( oldQueryParams.customize_messenger_channel ) {

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newQueryParams.customize_messenger_channel = oldQueryParams.customize_messenger_channel;

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}

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urlParser.search = $.param( newQueryParams );

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return urlParser.href;

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};

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history.replaceState = ( function( nativeReplaceState ) {

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return function historyReplaceState( data, title, url ) {

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currentHistoryState = data;

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return nativeReplaceState.call( history, data, title, 'string' === typeof url && url.length > 0 ? injectUrlWithState( url ) : url );

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};

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} )( history.replaceState );

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history.pushState = ( function( nativePushState ) {

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return function historyPushState( data, title, url ) {

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currentHistoryState = data;

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return nativePushState.call( history, data, title, 'string' === typeof url && url.length > 0 ? injectUrlWithState( url ) : url );

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};

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} )( history.pushState );

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window.addEventListener( 'popstate', function( event ) {

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currentHistoryState = event.state;

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} );

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}( history ) );

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/**

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* Returns a debounced version of the function.

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*

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* @todo Require Underscore.js for this file and retire this.

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*/

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debounce = function( fn, delay, context ) {

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var timeout;

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return function() {

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var args = arguments;

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context = context || this;

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clearTimeout( timeout );

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timeout = setTimeout( function() {

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timeout = null;

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fn.apply( context, args );

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}, delay );

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};

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};

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/**

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* @memberOf wp.customize

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* @alias wp.customize.Preview

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*

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* @constructor

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* @augments wp.customize.Messenger

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* @augments wp.customize.Class

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* @mixes wp.customize.Events

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*/

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api.Preview = api.Messenger.extend(/** @lends wp.customize.Preview.prototype */{

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/**

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* @param {Object} params - Parameters to configure the messenger.

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* @param {Object} options - Extend any instance parameter or method with this object.

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*/

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initialize: function( params, options ) {

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var preview = this, urlParser = document.createElement( 'a' );

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api.Messenger.prototype.initialize.call( preview, params, options );

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urlParser.href = preview.origin();

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preview.add( 'scheme', urlParser.protocol.replace( /:$/, '' ) );

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preview.body = $( document.body );

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preview.window = $( window );

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if ( api.settings.channel ) {

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// If in an iframe, then intercept the link clicks and form submissions.

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preview.body.on( 'click.preview', 'a', function( event ) {

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preview.handleLinkClick( event );

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} );

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preview.body.on( 'submit.preview', 'form', function( event ) {

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preview.handleFormSubmit( event );

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} );

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preview.window.on( 'scroll.preview', debounce( function() {

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preview.send( 'scroll', preview.window.scrollTop() );

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}, 200 ) );

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preview.bind( 'scroll', function( distance ) {

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preview.window.scrollTop( distance );

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});

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}

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},

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/**

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* Handle link clicks in preview.

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*

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* @since 4.7.0

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* @access public

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*

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* @param {jQuery.Event} event Event.

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*/

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handleLinkClick: function( event ) {

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var preview = this, link, isInternalJumpLink;

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link = $( event.target ).closest( 'a' );

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// No-op if the anchor is not a link.

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if ( _.isUndefined( link.attr( 'href' ) ) ) {

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return;

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}

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// Allow internal jump links and JS links to behave normally without preventing default.

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isInternalJumpLink = ( '#' === link.attr( 'href' ).substr( 0, 1 ) );

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if ( isInternalJumpLink || ! /^https?:$/.test( link.prop( 'protocol' ) ) ) {

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return;

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}

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// If the link is not previewable, prevent the browser from navigating to it.

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if ( ! api.isLinkPreviewable( link[0] ) ) {

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wp.a11y.speak( api.settings.l10n.linkUnpreviewable );

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event.preventDefault();

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return;

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}

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// Prevent initiating navigating from click and instead rely on sending url message to pane.

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event.preventDefault();

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/*

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* Note the shift key is checked so shift+click on widgets or

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* nav menu items can just result on focusing on the corresponding

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* control instead of also navigating to the URL linked to.

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*/

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if ( event.shiftKey ) {

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return;

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}

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// Note: It's not relevant to send scroll because sending url message will have the same effect.

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preview.send( 'url', link.prop( 'href' ) );

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},

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/**

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* Handle form submit.

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*

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* @since 4.7.0

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* @access public

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*

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* @param {jQuery.Event} event Event.

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*/

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handleFormSubmit: function( event ) {

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var preview = this, urlParser, form;

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urlParser = document.createElement( 'a' );

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form = $( event.target );

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urlParser.href = form.prop( 'action' );

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// If the link is not previewable, prevent the browser from navigating to it.

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if ( 'GET' !== form.prop( 'method' ).toUpperCase() || ! api.isLinkPreviewable( urlParser ) ) {

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wp.a11y.speak( api.settings.l10n.formUnpreviewable );

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event.preventDefault();

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return;

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}

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/*

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* If the default wasn't prevented already (in which case the form

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* submission is already being handled by JS), and if it has a GET

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* request method, then take the serialized form data and add it as

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* a query string to the action URL and send this in a url message

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* to the customizer pane so that it will be loaded. If the form's

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* action points to a non-previewable URL, the customizer pane's

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* previewUrl setter will reject it so that the form submission is

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* a no-op, which is the same behavior as when clicking a link to an

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* external site in the preview.

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*/

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if ( ! event.isDefaultPrevented() ) {

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if ( urlParser.search.length > 1 ) {

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urlParser.search += '&';

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}

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urlParser.search += form.serialize();

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preview.send( 'url', urlParser.href );

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}

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// Prevent default since navigation should be done via sending url message or via JS submit handler.

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event.preventDefault();

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}

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});

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/**

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* Inject the changeset UUID into links in the document.

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*

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* @since 4.7.0

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* @access protected

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* @access private

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*

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* @return {void}

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*/

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api.addLinkPreviewing = function addLinkPreviewing() {

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var linkSelectors = 'a[href], area[href]';

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// Inject links into initial document.

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$( document.body ).find( linkSelectors ).each( function() {

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api.prepareLinkPreview( this );

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} );

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// Inject links for new elements added to the page.

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if ( 'undefined' !== typeof MutationObserver ) {

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api.mutationObserver = new MutationObserver( function( mutations ) {

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_.each( mutations, function( mutation ) {

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$( mutation.target ).find( linkSelectors ).each( function() {

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api.prepareLinkPreview( this );

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} );

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} );

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} );

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api.mutationObserver.observe( document.documentElement, {

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childList: true,

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subtree: true

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} );

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} else {

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// If mutation observers aren't available, fallback to just-in-time injection.

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$( document.documentElement ).on( 'click focus mouseover', linkSelectors, function() {

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api.prepareLinkPreview( this );

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} );

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}

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};

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/**

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* Should the supplied link is previewable.

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*

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* @since 4.7.0

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* @access public

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*

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* @param {HTMLAnchorElement|HTMLAreaElement} element Link element.

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* @param {string} element.search Query string.

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* @param {string} element.pathname Path.

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* @param {string} element.host Host.

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* @param {Object} [options]

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* @param {Object} [options.allowAdminAjax=false] Allow admin-ajax.php requests.

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* @return {boolean} Is appropriate for changeset link.

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*/

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api.isLinkPreviewable = function isLinkPreviewable( element, options ) {

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var matchesAllowedUrl, parsedAllowedUrl, args, elementHost;

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args = _.extend( {}, { allowAdminAjax: false }, options || {} );

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if ( 'javascript:' === element.protocol ) { // jshint ignore:line

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return true;

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}

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// Only web URLs can be previewed.

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if ( 'https:' !== element.protocol && 'http:' !== element.protocol ) {

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return false;

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}

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elementHost = element.host.replace( /:(80|443)$/, '' );

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parsedAllowedUrl = document.createElement( 'a' );

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matchesAllowedUrl = ! _.isUndefined( _.find( api.settings.url.allowed, function( allowedUrl ) {

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parsedAllowedUrl.href = allowedUrl;

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return parsedAllowedUrl.protocol === element.protocol && parsedAllowedUrl.host.replace( /:(80|443)$/, '' ) === elementHost && 0 === element.pathname.indexOf( parsedAllowedUrl.pathname.replace( /\/$/, '' ) );

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} ) );

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if ( ! matchesAllowedUrl ) {

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return false;

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}

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// Skip wp login and signup pages.

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if ( /\/wp-(login|signup)\.php$/.test( element.pathname ) ) {

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return false;

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}

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// Allow links to admin ajax as faux frontend URLs.

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if ( /\/wp-admin\/admin-ajax\.php$/.test( element.pathname ) ) {

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return args.allowAdminAjax;

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}

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// Disallow links to admin, includes, and content.

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if ( /\/wp-(admin|includes|content)(\/|$)/.test( element.pathname ) ) {

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return false;

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}

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return true;

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};

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/**

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* Inject the customize_changeset_uuid query param into links on the frontend.

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*

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* @since 4.7.0

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* @access protected

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*

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* @param {HTMLAnchorElement|HTMLAreaElement} element Link element.

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* @param {string} element.search Query string.

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* @param {string} element.host Host.

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* @param {string} element.protocol Protocol.

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* @return {void}

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*/

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api.prepareLinkPreview = function prepareLinkPreview( element ) {

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var queryParams, $element = $( element );

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// Skip elements with no href attribute. Check first to avoid more expensive checks down the road.

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if ( ! element.hasAttribute( 'href' ) ) {

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return;

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}

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// Skip links in admin bar.

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if ( $element.closest( '#wpadminbar' ).length ) {

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return;

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}

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// Ignore links with href="#", href="#id", or non-HTTP protocols (e.g. javascript: and mailto:).

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if ( '#' === $element.attr( 'href' ).substr( 0, 1 ) || ! /^https?:$/.test( element.protocol ) ) {

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return;

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}

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// Make sure links in preview use HTTPS if parent frame uses HTTPS.

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if ( api.settings.channel && 'https' === api.preview.scheme.get() && 'http:' === element.protocol && -1 !== api.settings.url.allowedHosts.indexOf( element.host ) ) {

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element.protocol = 'https:';

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}

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// Ignore links with class wp-playlist-caption.

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if ( $element.hasClass( 'wp-playlist-caption' ) ) {

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return;

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}

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if ( ! api.isLinkPreviewable( element ) ) {

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// Style link as unpreviewable only if previewing in iframe; if previewing on frontend, links will be allowed to work normally.

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if ( api.settings.channel ) {

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$element.addClass( 'customize-unpreviewable' );

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}

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return;

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}

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$element.removeClass( 'customize-unpreviewable' );

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queryParams = api.utils.parseQueryString( element.search.substring( 1 ) );

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queryParams.customize_changeset_uuid = api.settings.changeset.uuid;

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if ( api.settings.changeset.autosaved ) {

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queryParams.customize_autosaved = 'on';

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}

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if ( ! api.settings.theme.active ) {

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queryParams.customize_theme = api.settings.theme.stylesheet;

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}

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if ( api.settings.channel ) {

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queryParams.customize_messenger_channel = api.settings.channel;

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}

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element.search = $.param( queryParams );

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};

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[387] Fix | Delete

/**

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* Inject the changeset UUID into Ajax requests.

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*

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* @since 4.7.0

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* @access protected

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*

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* @return {void}

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*/

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api.addRequestPreviewing = function addRequestPreviewing() {

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/**

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* Rewrite Ajax requests to inject customizer state.

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*

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* @param {Object} options Options.

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* @param {string} options.type Type.

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* @param {string} options.url URL.

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* @param {Object} originalOptions Original options.

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* @param {XMLHttpRequest} xhr XHR.

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* @return {void}

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*/

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var prefilterAjax = function( options, originalOptions, xhr ) {

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var urlParser, queryParams, requestMethod, dirtyValues = {};

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urlParser = document.createElement( 'a' );

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urlParser.href = options.url;

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// Abort if the request is not for this site.

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if ( ! api.isLinkPreviewable( urlParser, { allowAdminAjax: true } ) ) {

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return;

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}

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queryParams = api.utils.parseQueryString( urlParser.search.substring( 1 ) );

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// Note that _dirty flag will be cleared with changeset updates.

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api.each( function( setting ) {

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if ( setting._dirty ) {

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dirtyValues[ setting.id ] = setting.get();

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}

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} );

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if ( ! _.isEmpty( dirtyValues ) ) {

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requestMethod = options.type.toUpperCase();

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// Override underlying request method to ensure unsaved changes to changeset can be included (force Backbone.emulateHTTP).

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if ( 'POST' !== requestMethod ) {

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xhr.setRequestHeader( 'X-HTTP-Method-Override', requestMethod );

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queryParams._method = requestMethod;

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options.type = 'POST';

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}

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// Amend the post data with the customized values.

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if ( options.data ) {

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options.data += '&';

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} else {

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options.data = '';

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}

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options.data += $.param( {

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customized: JSON.stringify( dirtyValues )

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} );

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}

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// Include customized state query params in URL.

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queryParams.customize_changeset_uuid = api.settings.changeset.uuid;

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if ( api.settings.changeset.autosaved ) {

[449] Fix | Delete

queryParams.customize_autosaved = 'on';

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}

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if ( ! api.settings.theme.active ) {

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queryParams.customize_theme = api.settings.theme.stylesheet;

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}

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// Ensure preview nonce is included with every customized request, to allow post data to be read.

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queryParams.customize_preview_nonce = api.settings.nonce.preview;

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urlParser.search = $.param( queryParams );

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options.url = urlParser.href;

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};

[461] Fix | Delete

[462] Fix | Delete

$.ajaxPrefilter( prefilterAjax );

[463] Fix | Delete

};

[464] Fix | Delete

[465] Fix | Delete

/**

[466] Fix | Delete

* Inject changeset UUID into forms, allowing preview to persist through submissions.

[467] Fix | Delete

*

[468] Fix | Delete

* @since 4.7.0

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* @access protected

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*

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* @return {void}

[472] Fix | Delete

*/

[473] Fix | Delete

api.addFormPreviewing = function addFormPreviewing() {

[474] Fix | Delete

[475] Fix | Delete

// Inject inputs for forms in initial document.

[476] Fix | Delete

$( document.body ).find( 'form' ).each( function() {

[477] Fix | Delete

api.prepareFormPreview( this );

[478] Fix | Delete

} );

[479] Fix | Delete

[480] Fix | Delete

// Inject inputs for new forms added to the page.

[481] Fix | Delete

if ( 'undefined' !== typeof MutationObserver ) {

[482] Fix | Delete

api.mutationObserver = new MutationObserver( function( mutations ) {

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_.each( mutations, function( mutation ) {

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$( mutation.target ).find( 'form' ).each( function() {

[485] Fix | Delete

api.prepareFormPreview( this );

[486] Fix | Delete

} );

[487] Fix | Delete

} );

[488] Fix | Delete

} );

[489] Fix | Delete

api.mutationObserver.observe( document.documentElement, {

[490] Fix | Delete

childList: true,

[491] Fix | Delete

subtree: true

[492] Fix | Delete

} );

[493] Fix | Delete

}

[494] Fix | Delete

};

[495] Fix | Delete

[496] Fix | Delete

/**

[497] Fix | Delete

* Inject changeset into form inputs.

[498] Fix | Delete

*

[499] Fix | Delete